<?php
/**
 * Created by PhpStorm.
 * User: dolia
 * Date: 15/12/3
 * Time: 下午4:46
 */

namespace App\Interfaces;

interface AdService
{

    /**
     *
     * 获取广告
     *
     * @param $position_key   广告位置id索引
     * @return mixed    广告集合 AdModel
     */
    public function get($position_key);
}